[← Utils](../README.md)

# Utils/FA

Shared base classes used across the ecosystem: ATR access, bar control, auto-cleanup, simple logging, diffs and sorting.

## Main features
- ATR wrapper for indicator access (`CAtr` and related classes in `Atr.mqh`).
- Bar-change detection helpers, including per-timeframe variants (`CBarControler`, `CBarControlerFastW1`, `CBarControlerFastMN1`, `CBarControlerFastMinors`).
- Automatic pointer cleanup on deinit (`CAutoCleaner`).
- Lightweight logging base used by other modules (`CLoggerBase`).
- Distance/diff calculators — by points or by ATR (`CDiff`, `CDiffPoint`, `CDiffAtr`).
- Simple array sorting (`CSimpleSort`).

## Basic usage

### Bar control
```mql5
CBarControler bar_ctrl;
bar_ctrl.Init(_Symbol, PERIOD_CURRENT);

if(bar_ctrl.IsNewBar())
  {
   // new bar logic
  }
```

### Auto-cleanup
```mql5
CAtr* g_atr = new CAtr();
g_atr.Create(_Period, _Symbol, 14, true, true);
CAutoCleaner::AddPtr(g_atr); // will be deleted automatically on deinit
```

### Diff by ATR
```mql5
CDiffAtr* diff = CreateDiffptr(MODE_DIFF_BY_ATR, _Symbol, g_atr, 0, 1.5);
```

> Only the most representative classes are shown here.